19-0157; Rev 2; 8/03
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
General Description
The MAX913 single and MAX912 dual, high-speed,
low-power comparators have differential inputs and
complementary TTL outputs. Fast propagation delay
(10ns, typ), extremely low supply current, and a wide
common-mode input range that includes the negative
rail make the MAX912/MAX913 ideal for low-power,
high-speed, single +5V (or ±5V) applications such as
V/F converters or switching regulators.
The MAX912/MAX913 outputs remain stable through
the linear region. This feature eliminates output instabili-
ty common to high-speed comparators when driven
with a slow-moving input signal.
The MAX912/MAX913 can be powered from a single
+5V supply or a ±5V split supply. The MAX913 is an
improved plug-in replacement for the LT1016. It pro-
vides significantly wider input voltage range and equiv-
alent speed at a fraction of the power. The MAX912
dual comparator has equal performance to the MAX913
and includes independent latch controls.
o
Ultra Fast (10ns)
o
Single +5V or Dual ±5V Supply Operation
o
Input Range Extends Below Negative Supply
o
Low Power: 6mA (+5V) Per Comparator
o
No Minimum Input Signal Slew-Rate Requirement
o
No Power-Supply Current Spiking
o
Stable in the Linear Region
o
Inputs Can Exceed Either Supply
o
Low Offset Voltage: 0.8mV
o
Now Available in a Small µMAX Package
Features
MAX912/MAX913
Ordering Information
PART
MAX912CPE
MAX912CSE
MAX912EPE
MAX912ESE
MAX913CPA
MAX913CSA
MAX913EPA
MAX913ESA
MAX913EUA
TEMP RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 µMAX
Applications
Zero-Crossing Detectors
Ethernet Line Receivers
Switching Regulators
High-Speed Sampling Circuits
High-Speed Triggers
Extended Range V/F Converters
Fast Pulse Width/Height Discriminators
Pin Configurations
TOP VIEW
MAX912
MAX913
V+
IN+
IN-
1
2
3
8
7
6
5
Q
Q
GND
LE
QA 1
QA 2
GND 3
LEA 4
N.C. 5
V- 6
INA- 7
A
B
16 QB
15 QB
14 GND
13 LEB
12 N.C.
11 V+
10 INB-
9
INB+
V- 4
DIP/SO/µMAX
INA+ 8
DIP/NARROW SO
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
MAX912/MAX913
ABSOLUTE MAXIMUM RATINGS
Positive Supply Voltage .........................................................+7V
Negative Supply Voltage ........................................................-7V
V+ to V- ................................................................................+13V
Differential Input Voltage .....................................................+15V
Input Voltage (Referred to V-) ................................-0.3V to +14V
Latch Pin Voltage .............................................Equal to Supplies
Continuous Output Current...............................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)842mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) .696mW
Operating Temperature Ranges:
MAX91_C_ _ ...........................................................0°C to +70°C
MAX91_E_ _.........................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
V+ = +5V, V- = -5V, V
Q
= 1.4V, V
LE
= 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Input Offset Voltage (Note 2)
Offset Drift
Input Offset Current (Note 2)
Input Bias Current
Input Voltage Range
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Small-Signal Voltage Gain
SYMBOL
V
OS
TCV
OS
I
OS
I
B
V
CM
CMRR
PSRR
A
V
V
OH
Output Voltage
V
OL
Positive Supply Current Per
Comparator (Note 3)
Negative Supply Current Per
Comparator (Note 3)
Latch-Pin High Input Voltage
Latch-Pin Low Input Voltage
Latch-Pin Current
I+
I-
V
IH
V
IL
I
IL
V
LE
= 0V
-1
2.0
0.8
-20
T
A
= +25°C
T
A
= T
MIN TO
T
MAX
T
A
= +25°C
C, E temperature ranges
C, E temperature ranges
Single +5V
C, E temperature ranges
-5.0V
≤
V
CM
≤
+3.5V
Positive supply; 4.5V
≤
V+
≤
5.5V
Negative supply; -2V
≥
V-
≥
-7V
1V
≤
V
Q
≤
2V, T
A
= +25°C
V+
≥
4.5V
I
SINK
= 4mA
T
A
= +25°C, I
SINK
= 10mA
C, E temperature ranges
I
OUT
= 1mA
I
OUT
= 10mA
-5.2
-0.2
80
60
80
1500
2.7
2.4
110
85
100
3500
3.4
3.0
0.3
0.4
6
1
10
2
mA
mA
V
V
µA
0.5
V
2
R
S
≤
100Ω
CONDITIONS
T
A
= +25°C
T
A
= T
MIN TO
T
MAX
2
0.3
0.5
1
5
8
+3.5
+3.5
MIN
TYP
0.1
MAX
2
3
UNITS
mV
µV/°C
µA
µA
V
dB
dB
V/V
2
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
ELECTRICAL CHARACTERISTICS (continued)
V+ = +5V, V- = -5V, V
Q
= 1.4V, V
LE
= 0V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
∆V
IN
= 100mV,
V
OD
= 5mV
∆V
IN
= 100mV,
V
OD
= 20mV
∆V
IN
= 100mV,
V
OD
= 5mV
∆V
IN
= 100mV,
V
OD
= 5mV
(MAX912 only)
t
SU
t
H
t
LPD
CONDITIONS
T
A
= +25°C
T
A
= T
MIN TO
T
MAX
T
A
= +25°C
T
A
= T
MIN TO
T
MAX
T
A
= +25°C
MAX913
MAX912
2
3
500
2
5
0
2
7
9
MIN
TYP
10
MAX
14
16
12
15
4
5
ns
ns
UNITS
MAX912/MAX913
Propagation Delay (Note 4)
t
PD+
, t
PD-
Differential Propagation Delay
(Note 4)
Channel-to-Channel Propagation
Delay (Note 4)
Latch Setup Time (Note 5)
Latch Hold Time (Note 5)
Latch Propagation Delay (Note 6)
∆t
PD
T
A
= +25°C
ps
ns
ns
ns
Note 1:
All specifications are 100% tested at T
A
= +25°C, unless otherwise noted. Specification limits over temperature (T
A
= T
MIN
to T
MAX
) are guaranteed by design.
Note 2:
Input Offset Voltage (V
OS
) is defined as the average of the two input offset voltages, measured by forcing first one output,
then the other to 1.4V. Input Offset Current (I
OS
) is defined the same way.
Note 3:
Supply currents are measured with V
Q
driven to both V
OH
and V
OL
(not 1.4V).
Note 4:
Propagation Delay (t
PD
) and Differential Propagation Delay (∆t
PD
) cannot be measured in automatic handling equipment
with low input overdrive values. Characterization and correlation tests have shown that t
PD
and
∆t
PD
limits can be guaran-
teed by design. Electrical Characteristic DC tests are performed to guarantee that all internal bias conditions are correct.
For low overdrive conditions, V
OS
is added to overdrive. Differential Propagation Delay is defined as
∆t
PD
= t
PD+
- t
PD-
.
Note 5:
Input latch setup time (t
SU
) is the interval in which the input signal must be stable prior to asserting the latch signal. The hold
time (t
H
) is the interval after the latch is asserted in which the input signal must be stable. These parameters are guaranteed
by design.
Note 6:
Latch Propagation Delay (t
LPD
) is the delay time for the output to respond when the latch-enable pin is deasserted (see
Timing Diagram).
_______________________________________________________________________________________
3
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
MAX912/MAX913
Typical Operating Characteristics
(V+ = +5V, V- = -5V, V
LE
= 0V, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
PROPAGATION DELAY
vs. INPUT OVERDRIVE
MAX912/13 toc01
PROPAGATION DELAY
vs. SOURCE RESISTANCE
MAX912/13 toc02
PROPAGATION DELAY
vs. LOAD CAPACITANCE
V
OD
= 10mV
12
PROPAGATION DELAY (ns)
10
8
6
4
2
0
t
PD+
t
PD-
MAX912/13 toc03
10
20
18
PROPAGATION DELAY (ns)
16
14
12
10
8
6
4
2
t
PD+
t
PD-
V
OD
= 10mV
14
PROPAGATION DELAY (ns)
9
8
t
PD+
7
t
PD-
6
5
1
10
INPUT OVERDRIVE (mV)
100
0
1
10
100
1k
10k
SOURCE RESISTANCE (Ω)
10
20
30
40
50
LOAD CAPACITANCE (pF)
PROPAGATION DELAY
vs. TEMPERATURE
MAX912/13 toc04
POSITIVE SUPPLY CURRENT
(PER COMPARATOR)
vs. POSITIVE SUPPLY VOLTAGE
MAX912/13 toc05
NEGATIVE SUPPLY CURRENT
(PER COMPARATOR)
vs. NEGATIVE SUPPLY VOLTAGE
T
A
= +85°C
MAX912/13 toc06
11
V
OD
= 5mV
10
PROPAGATION DELAY (ns)
9
8
7
6
5
-40
-20
40
TEMPERATURE (°C)
0
20
60
80
Q OUTPUT
t
PD-
Q OUTPUT
t
PD-
10
9
8
7
I+ (mA)
V- = 0 TO 5V
T
A
= +85°C
1.4
1.2
1.0
I- (mA)
0.8
T
A
= +25°C
Q OUTPUT
t
PD+
6
5
4
3
2
T
A
= +25°C
T
A
= -40°C
T
A
= -40°C
0.6
0.4
0.2
Q OUTPUT
t
PD+
1
0
3
4
5
V+ (V)
6
7
0
1
2
3
V- (V)
4
5
6
7
OFFSET VOLTAGE
vs. TEMPERATURE
MAX912/13 toc07
INPUT BIAS CURRENT
vs. TEMPERATURE
MAX912/13 toc08
OUTPUT VOLTAGE
vs. DIFFERENTIAL INPUT VOLTAGE
MAX912/13 toc09
600
500
OFFSET VOLTAGE (µV)
400
300
200
100
0
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
3.0
2.5
INPUT BIAS CURRENT (µA)
2.0
V
CM
= -5.2V
1.5
1.0
0.5
0
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
V
CM
= 0V
V
CM
= 3.5V
5
4
OUTPUT VOLTAGE (V)
3
2
1
0
-3
-2
-1
0
1
2
3
DIFFERENTIAL INPUT VOLTAGE (mV)
4
_______________________________________________________________________________________
Single/Dual, Ultra-Fast, Low-Power
Precision TTL Comparators
Typical Operating Characteristics (continued)
(V+ = +5V, V- = -5V, V
LE
= 0V, C
L
= 15pF, T
A
= +25°C, unless otherwise noted.)
POSITIVE-TO-NEGATIVE PROPAGATION DELAY
INPUT
100mV/div
OUTPUT
Q
MAX912/MAX913
NEGATIVE-TO-POSITIVE PROPAGATION DELAY
INPUT
100mV/div
OUTPUT
Q
1V/div
1V/div
Q
Q
5ns/div
5ns/div
MAX912/MAX913 RESPONSE TO
50MHZ (±10mV
P-P
) SINE WAVE
INPUT
10mV/div
OUTPUT
Q
2V/div
10ns/div
MAX912/MAX913 RESPONSE TO SLOW-MOVING TRIANGLE WAVE
MAX912/MAX913 RESPONSE
INPUT
20mV/div
OUTPUT
Q
1V/div
Q
1V/div
INDUSTRY-STANDARD
686 RESPONSE
INPUT
20mV/div
OUTPUT
Q
1V/div
Q
1V/div
20µs/div
20µs/div
_______________________________________________________________________________________
5
嵌入式系统
